I have been using these products for years and love the $$$ I save. This was a new set of T127's. Easiest loading ever. From start to finish, 40 minutes. Done at the bathroom sink. !st put down wax paper with a paper towel cover. I have 4 syringes so I have only one cleanup after I am done. On each cartridge, I loaded 10 ml first, then followed with 4 so as not to overfill. After filling, wipe off the fill hole and replug only that hole with the colored tab. I then rinse the used syringe in the sink and go on to the next color. After all 4 cartridges are loaded, I clean up the syringes, needles and put everything away for the next time.
The replacement cartridges, at Sams Club, would have cost me about $75. Ink and Cartridges from Daratek were about $60 so I made $15 for 40 minutes work. The kicker is that each ink bottle holds enough for another 5 free full refills, plus another 12 on the 2 other bottles of black, so I am saving $75 each time I do the work. Hard to beat over $100 an hour these days. Plus, I don't have to run to the store if a cartridge runs out of ink.
All in all, best investment ever and easiest to fill of all that I have used.

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